Ctttter-head



A. WEBER.

CUTIER HEAD.

APPLICATION FILED JULY15.I918. 1,317,1 1 3. Patented Sept. 23, 1919.

2 SHEETS-SHEET I.

& 9 1.

WITNESSES INVENTOR WA Mw A. WEBER.

- CUTTER HEAD.

APPLICATION FILED JULY I5. 1918.

1,317,1 1 3. PatentedSept. 23, 1919.

2 SHEETS-SHEET 2- WITNESSES= INVENTOR v UNITD STATES PATENT onnron.

ALBERT WEBER, 0F SEATTLE, WASHINGTON, ASSIGNOR OF ONE-HALF T0 JOHNHLAKAN SON, OF KINGCOUNTY, WASHINGTON.

CUTTER-HEAD.

Specification of Letters Patent. Patented Sept 23,1919.

Application filed July 15 1918. Serial No. 244,871.

To all whom it may concern:

Be it known that I, ALBERT W'nnnn, citizen of the United States,residing at Seattle, in the county of King and State of Washington, haveinvented certain new, and useful Improvements in Cutter Heads, of whichthe following is a specification.

This invention relates to improvements in cutter heads and has for itsprincipal object to provide an improved and novel clesign of cutter headwhich looks the knives between concentric plates; to provide, in acutter head, a plurality of concentric plates some of which have annularribs and means for binding notched knives intermediate the plates withthe notches cooperating with the ribs. In cutter heads it is necessarythat the knives be held securely both radially and laterally and thatthey be secured positively against accidental release from the head. Ourimproved cutter head accomplishes the above results.

Other objects will appear as my invention is more fully explained in thefollowing specification, illustrated in the accompanying drawings andpointed out in the appended claim.

In the drawings Figure 1 is a side elevation, with parts broken away ofmy cutter head. Fig. 2 is a bottom plan view of the top plate of myassembled head. Fig. 3 is a plan view of a knife plate of my head. Fig.4 is a side elevation, with parts broken away, of a companion cutterhead. Fig. 5 is a plan view of the assembled plates of Fig. 4: takenalong line ww. Fig. 6 is a plan view of knives for the head shown inFigs. 4 and 5. Fig. 7 is a side elevation of Fig. 6.

Referring more particularly to the drawings numeral 1 indicates atubular core having a shouldered portion 2. The small end of core 1 isthreaded as at 3. In operation the core sets over a belt driven spindleto which it is held by means of set screws 4. In Figs. 1 to 3 inclusivea plain bottom plate 5 fits on to the core 1 against shoulder 2 and nextto bottom plate 5 a knife plate 6 fits on to core 1. Knife plate 6 hasknife slots 7 in its periphery to receive knives 8 which are set on edgeand project beyond the plate on either side. A ribbed plate 9 fits overcore 1 and has an annular rib 10 which fits into notches 11 in knives 8.Plate 9 also has knife slots 7 to receive knives 12. The knife slots 7are the same in plates 6 and 9 but receive different knives as shown forcutting a bead or tongue on the edge of a board. A ribbed top plate 13is threaded on to'core 1 and has an annular rib 14 which fits intonotches in knives 12 similar to the notches 10 in knives 8. Plates 5 and13 are provided with set screw holes 15 to receive set screws 16. Inoperation the head is assembled, with the knives in place as justdescribed and shown in Fig. 1 with the top plate screwed down tight. Theset screws 16 are then tightened so as to lock the top plate,againstunscrewing and to gripthe knives 8 between plates 5 and 9 and the knives12 between plates 6 and'13. This gripping of the knives prevents lateralmovement or chattering, while cooperating ribs on the plates and notcheson the knives prevent the knives from flying from the head even thoughloosened.

Referring to Figs. 4 and 7, inclusive, which illustrate a companioncutter head for cutting the groove in the side of a board as inflooring, numeral 17 indicates a bottom plate which is similar to bottomplate 5 except that it has alternate set screws 18 and countersinks 19the latter of which permit of a set screw being passed through it. Aslotted knife plate 20, similar to plate 6 except that it has threadedset screw holes for set screws 21, is next placed upon core 1. Adjacentknife plate 20 a thin knife plate 22 is placed on core 1. Plate 22 hasknife slots 23 adapted to receive a wide facing knife 24 and a narrowgrooving knife 25 adjacent each other. An annular groove 26 extendsaround plate 22 in order to leave room for a rib 27 which is a part of aribbed knife plate 28 and which engages a notch 29 in knife 25. Plate 28is provided with knife slots which cooperate with the wide knife portionof slots 23. A top plate 30 similar in every way to top plate 13 screwson to core 1 and completes the head by employing set screws for lockingthe knives. In the latter head the facing knives are clamped betweenplates 17 and 30 with the holding rib on plate 30 and the knives 24 areclamped between plates 20 and 28 with the rib on plate 28. It will benoted that the knives in all cases are positively gripped and can notbecome detached from the cutter head except by considerable loosening ofthe plates.

While I have shown a particular form of embodiment of. my invention, Iam aware that many minor changes therein ,Will readi'ly'suggestthemselves to others skilled" in the art Without departing from thespirit and scope of my invention and-I therefore" desire to avoid beinglimited to the exact provided near one endWith a shoulder and s havingits opposite end screw threaded, means to-clamp the tubular core iuponva stationarv supportingelement; a plate provided'with an opening toloosely receive the tubular core and adapted to contact with rthe-shoulder, aknife plate having-an opening to loosely receive the coreand provided wlth slots extending through its top and bottom and throughits edge, knives ar- 7 ipimie ranged Within'the slots and projectingabove the knife 7 plate and having transverse grooves,- a; clampingplate having an open 2:

ing to? loosely receivethetubular core and 7 provided With a laterallyextending flange to enter the grooves, a plate having a screw threadedopening to snugly receive the screw r threaded portion of the tubula r-core,- and bolts, engaging, Within transverse screw threaded openingsin the last named plate a and adapted'to engage With the clamping plateto forceithe same into proper holding engagement With theknives, saidbolts also: serving as meansto lock thellast named a plate againstaccidental rotation.

in the presence of tWo Witnesses.

Witnesses: V g, V V

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